Annual report pursuant to Section 13 and 15(d)

Real Estate Facilities (Activity In Real Estate Facilities) (Details)

v3.20.4
Real Estate Facilities (Activity In Real Estate Facilities) (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2020
USD ($)
ft²
item
Dec. 31, 2019
USD ($)
ft²
item
Dec. 31, 2018
USD ($)
Property, Plant and Equipment [Line Items]      
Beginning Balances $ 1,889,238 $ 1,806,256 $ 1,617,287
Accumulated Depreciation, Beginning Balances (1,158,489)    
Acquisition of real estate facility 57,429 132,406 138,036
Consolidation of joint venture     106,717
Capital expenditures 36,328 40,092 38,904
Depreciation and amortization expense (90,058) (93,416) (96,732)
Transfer to properties held for sale 30 3,900 2,044
Accumulated Depreciation, Ending Balances (1,229,102) (1,158,489)  
Ending Balances $ 1,892,967 1,889,238 1,806,256
Properties held for sale, net   $ 15,264  
Number of buildings | item 675    
Rentable area (in square feet) | ft² 27,728,000    
Properties Held for Sale [Member]      
Property, Plant and Equipment [Line Items]      
Number of buildings | item   2  
Rentable area (in square feet) | ft²   40,000  
Land [Member]      
Property, Plant and Equipment [Line Items]      
Beginning Balances $ 844,419 $ 756,326 708,706
Acquisition of real estate facility 30,261 88,093 25,806
Consolidation of joint venture     21,814
Capital expenditures
Disposals
Depreciation and amortization expense
Transfer to properties held for sale
Ending Balances 874,680 844,419 756,326
Buildings And Improvements [Member]      
Property, Plant and Equipment [Line Items]      
Beginning Balances 2,203,308 2,135,863 1,921,379
Acquisition of real estate facility 27,168 44,313 112,230
Consolidation of joint venture     84,903
Capital expenditures 36,328 40,092 38,904
Disposals (19,399) (15,796) (17,345)
Transfer to properties held for sale (16) (1,164) (4,208)
Ending Balances 2,247,389 2,203,308 2,135,863
Accumulated Depreciation [Member]      
Property, Plant and Equipment [Line Items]      
Accumulated Depreciation, Beginning Balances (1,158,489) (1,085,933) (1,012,798)
Accumulated Depreciation, Disposals 19,399 15,796 17,345
Depreciation and amortization expense (90,058) (93,416) (96,732)
Transfer to properties held for sale 46 5,064 6,252
Accumulated Depreciation, Ending Balances $ (1,229,102) (1,158,489) $ (1,085,933)
Reclassification [Member]      
Property, Plant and Equipment [Line Items]      
Properties held for sale, net   3,800  
Reclassification [Member] | Land [Member]      
Property, Plant and Equipment [Line Items]      
Properties held for sale, net   2,200  
Reclassification [Member] | Buildings And Improvements [Member]      
Property, Plant and Equipment [Line Items]      
Properties held for sale, net   2,800  
Reclassification [Member] | Accumulated Depreciation [Member]      
Property, Plant and Equipment [Line Items]      
Properties held for sale, net   $ 1,200